Half to charles andrew zerbe



(No Model.)

- J. H. MILLER.

WRENCH.

No. 333,963. Patented Jan. '5, 1886.

NITED STATES ATENT FFICEQ JOHN HARRIS MILLER, OF LEl/VISTOWN,PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO CHARLES ANDREXV ZERBE, OF SAMEPLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 333,963, dated January5, 1886.

Application filed August 1, 1885. Serial No. 173,264. (No model.)

To all whom it may concern:

Be it known that I, JOHN HARRIS MILLER, a citizen of the United States,residing at Lewistown, in the county of Mifflin and State ofPennsylvania, have invented certain new and useful Improvements inrenches; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to certain improvements in wrenches; and it has forits object to provide a screw-wrench with which both a rapid and fineadjustment can be made. [5 It consists in a certain novel construct onand arrangement of the various parts, all of which I will now proceed topoint out and describe, reference beinghad to the accompanying drawings,in which Figure 1 is a side elevation of a wrench pro vided with myimprovement; Fig. 2, a vertical longitudinal section, and Fig. 3 adetail.

Referring to said drawings, Ais the handle of the wrench; B, the bar; 0,the stationary 2 aw, secured to the outer end of the bu" B.

l) is the sliding jaw, provided with the usual retaining and guidingloops, a.

E is the opera-tingserew, provided with a milled head, b.

c is a socket in the sliding jaw, in which the operating-screw enters.

D is a movable section forming part of the sliding jaw, and is providedwith a heel, d, which enters a slot, d, in said sliding jaw,and ispivoted to the same at d. The inner side of the movable section isgrooved longitudinally and forms the upper portion of the socket 0. Oneend of the movable section is screw threaded on its inner side, andforms a half- 40 nut, e, which engages with the operatingscrew E.

F is a spring in the slot at, which engages with the heel d at a pointabove the pivot,and serves to hold the half-nut e in engagement with theoperating-screw.

ff are lugs on either side of the half-nut, for moving said nut out ofengagement with the operating-screw. The inner end, f, of the movablesection is beveled, and engages with 0 a beveledshoulder, f, on thesliding jaw. As pressure is exerted on the sliding jaw, the

beveled shoulder, engaging with the end of the movable section, coactswith the spring to hold the half-nut in engagement with theoperatingscrew. The greater the pressure on the sliding jaw the firmerthe half-nut holds on to the thread of the screw.

To use my invention, take hold of the lugs fand move the half-nut out ofengagement with the operatingscrew. Then slide the jaw along the baruntilit engages with the nut to be turned, thus making a rapidadjustment. Then let go of the lugs, and the spring will throw thehalf-nut in engagement with the operating-screw, and by turning saidscrew a 6: line adjustment can be made.

My invention is simple and strong in its construction, and so arrangedthat it is almost impossible for the various parts to get out of order.It has all of the advantages of a screwwrenchand at the same time admitsof a very rapid adj ustment.

I am aware that wrenches have been made with a movable section hinged tothe sliding jaw, and having a half-nut on said movable section heldnormally in engagement with the operating-screw by a spring. Thisconstruction I do not claim, broadly, as my invention; but

WVhat I claim is In the herein-described wrench, the combination of thebar B, having the stationary jaw O at one end, with the operating-screwE and the slidingjaw D,having loops a,surrounding the bar B, a movablesection, D, hinged at one end to the sliding jaw, a socket, 0, formedbetween the sliding jaw and movable section and adapted to receive theoperatingscrew, said movable section D partially surrounding saidoperating-screw and forming the outer portion of the socket c, andhaving a half-nut, c, on its free end, engaging with the screw E, and aspring, F, holding the movable section to its place, all arranged andoperating substantially as shown and described. 5

In testimony whereof I affix my signature in presence of two witnesses.

JOHN HARRIS MILLER.

WVitnesses:

LA FAYETTE WEBB, S. J. BRISBIN.

